Burner for cutting metal or for autogenous welding.



H. KNAPP. BURNER FOR CUTTING METAL OR FOR AUTOGENEOUSWELDING.

APPLICATION FILED JULY 5,1910.

tented Aug. 8, 1911.

H. KNAPP. BURNER FOR CUTTING METAL ORYPOR AUTOGENOUS WELDING.

' APPLICATION FILED JULY 5, 1910. 1,()()(),Q1 8. Patented Aug. 8, 1911 2 SHEETS-SHEET 2 HEINRICH KNAPP, OF VVEIMAR, GERMANY.

BURNER FOR CUTTING METAL OR FOR AUTOGENOUS 'WELDING.

oa ers.

Specification of Letters Patent.

Application filed July 5, 1910.

Patented Aug. 8, 1911. Serial No. 570,439.

To all 117mm it may concern:

Re i' known that l, Hammett Kxarr, engineer, a subject of the German Emperor, residing at Vi'eimar. Grand Duchy of axell",imardlisenach, Germany, have invented certain new and use'lul Improvements in or Relating to Burners tor Cutting Metal or for .uttogenous lYelding, of which the following is a specification.

This invention relates to improvements in blow pipes and it proposes a construction which is superior to that ordinarily employed in a number of respects but more particularly in respect of involving a self-- contained, compact and graduated arrangement of a group of oxygen supply nozzles, each of a ditterent capacity from the others,

'and any one of which may be positioned in" operative relation to the mixing chamber by virtue of a simple adjustment which may be easily and quickly made. It will be readily apparent therefore that the present construct-iou avoids the necessity of having on hand a number of interchangeable burners, nozzles, or mixing chambers, since the intensity of the flameor the degree of heat may be almost instantly regulated to accord with the character and environments of the work by making the adjustment afore-- said.

The invention is of further advantage in that the arrangement is of such nature that the passage of the oxygen into the mixing chamber is accompanied by or produces an, injectorlike teeding action of the whereby independence of the. particular level of the gas holder is secured and the use of pressure regulators or the like is avoided.

The invention is illustrated in the accompanying drawings, wherein- Figure 1 is a vertical longitudinal section of one form of construction; Fig. 2 is a vertical cross section of the same; Fig. 3 is a vertical longitudinal section of a modified form of construction; Fig. 4 is a similar view of a further modified form of construction, Figs. 5 and (3 are horizontal sections in ditl'erent planes taken through the inlet end of the mixing chamber shown in Fig. 4; and Fig' 7 is a detail sectional view of the nozzle carrier and a group of nozzles thereon embodied in the construction shown in Fig. 4.

Similar characters of reference designate corresponding parts throughout the several viewsl T2. the construction shown in Figs. 1 and 3, a casing is employed to inclose and to provide for the operative connection and asseml'ilage of the working parts. This ca'sing is made in two suitably connected half sections a and b. The section a is formed with an inwardly directed trusto-conical projection 1 which is provided at a suitably selected point with an oxygen duct or passage 2, alining with and forming a continuation of an oxygen supply pipe 3. The proectlon 1 constitutes an internal bearing for an annular rotatably'assembled nozzle carrier'4, which carries the radially disposed oxygen nozzles 5, arranged atsuitable intervals, and each being of a. different capacity from the others, whereby, in accordance with which particular nozzle is alined with I the mixing chamber. the proportion of oxygen supplied may be increased or reduced.

The hub t of the carrier 4 conforinably surrounds the projection 1 and its seating is maintained by a suitable spring 6, one end of which bears against said hub 4 and the other end of which bears against a cover plate 7 which forms apart of the half section 1'). The nozzle carrier is provided with an axially projecting setting stem 8, which extends through the plate 7 and is provided with a hand wheel 9. The plate '7 is provided witha box and the stem 8 is provided with a conical flange 10 which fits conformably in an opening in the front wall of the box and is pressed into sealing engagement with the face of the opening by a spring 11 which surrounds the stem and bears at one end against the plate 7 and at the other end against the flange 10. The assemblage of the stem 8 is thus of gas-tight character. Gas, preferably acetylene, is supplied to the casing A through a pipe 12 which is connected to the section a of said casing. The

shell of the mixing chamber is shown at 13 and projects radially from the casing. The inner end of the shell is fitted into the easing at a point which will aline the mixing chamber and the nozzle adjacent thereto.

Each'nozzle, it will be observed, is of taper-' ing outline and the casing is also tapering, as at 14, adjacent the inlet end of the mixing chamber. Consequently a gradually constricting throatway intervenes between the tapering faces of the casing and theopcrating nozzle, which throatway provides for the injector-like action above referred to whereby the gasis forcibly drawn into the mixing chamber. This action may be farthcr as isted by guide plates l3 arranged at opposite sides of each nozzle. mouthpiece to is titted to the end ot the shell 13 and in comidcration ot the fact that ditl crentsizes of mouthpicces must he used in connection with ditl'ercnt widths of plates or bars. the connection between said mouthpicccand said shell o't detachable character, c. a bayonetjoint.

operation an adjunct is provided which coni 4 a as vsis-ts ot a casing 1T secured on the shell by a collar and inelosing a rotatably mounted nozzle carrier provided with nozzles 17% ot ditlcrent cap .tcit and arranged at suitable intervals. llach nozzle 17 as it may be positioned adjacent the mouthpiece to, is supplied with oxygen tl rough a duct 17" and an oxygen supply pipe lf communirates with said duct. The nozzles IT need not be arranged in a closed casing. as they are merely used for directing the additional oxygen supplied through the pipe 19, against; the flame.

In Fig. 3 a construction is shown which is similar in the main to that shown in Fig. 1 and embodies parts corresponding generally to the parts in Fig. 1 which are designated by the same reference numerals. these ret erence numerals in Fig. 3 being ditterentinted, however by exponents. These parts are the projection 1, the oxygen duct or passage 2, the oxygen supply pipe 3. the nozzle carrier 4;, the spring 6" to maintain the position of the nozzle carrier 4, the spring 11 to act on the stem 8 and to cause the flange 10 ot' the latter to seal the opening in the casing through which said, stem passes, and the pipe 12 for supplying to the casing. the said pipe conmumicating with the casing through a duct 12 in the part l. in this form ol. construction the part 1" has a coaxial outward extension in which are continued the duct or passage 2 for the oxygen and the duct or passage. 12 tor the gas. turning plug is fitted in this extension and is provided with independent openings 1 rrangcd to register with the respective passages and 12. The plug 20, obviously, provides for the Simultaneous regulation of the supply of gas and oxygen.

The construction shown in Figs. *1; to 7 is designed with re'lercru'tc to burners which are alwa s used for practically the same. work and which require no changing of mouth 'iieccs. in this case the conical part. as t, is provided at the end ot a relatively long shanl; and. as bcl'orc. constitutes an ii terual hca 'ing for the nozzle carrier. as at. which carries the nozzles. as 5 and is held in position by the spring, as 6*. The part 1 is provided with an axial duct l 'which supplies oxygen to the nozzles 5 and forms a continuation of the oxygen supply pipe 3.

For a cutting The shank of the part 1 is threaded into the casing which, in this case, is designated A and is not necessarily of sectional construction. The gas supply pipe 12 is titted in the upper end of the casing and the lower end of the casing is internally threaded for attaclunent to the enlarged inlet end of the mixing chamber shell. '11 this case dcsignated 13 The as emblage of the parts is of such nature that any one of the nozzles 7r which maybe alined with the mixing chamber will extend some distance into the inlet end of said chamber. Each nozzle is thittened at opposite sides. as at 21. and course quently when a nozzle is alined ith the mixing chamber, the sides which are not flattened will contact with the wall of the chamber and will thereby center the nozzle. while the tlattcned sides will a ti'ord narrow passages through which the gas will pass from the casing to the mixing chamber. The proper alincment of the nozzles with the mixing chamber is secured by a necessai v :uljustment of the part 1. which adjustment is possible owing to the screw thread connection between said part ,1 and the (as ing A. The rotation of the nozzle carrier is etl'ected by hand attcr the shell 12% has been disconnected trout the casing A. i narrower or wider nozzle, as may be required, is then positioned for aline nentr with the mixing chamber atter which the casing ll. and the shell 13 are screwed together.

llaving tully described my invention, l claim:

1. ft blow pipe of the type set forth comprising a closed casing. a shell projecting therefrom and forming a mixing chamber. a nozzle carrier rotatably mounted within the casino, a plurality of nozzles of t'litlercnt capacities arranged on the carrie :1 part having an oxygen supply duct with which a nozzle alincs when it alstraliims with the mixing chamber. and a gas supp y pipecoinmunicating with the casing.

2. A blow pipe of the type set forth comprising a closed casing. a shell projecting radially therefrom and forming a mixing chamber. a conical part projecting into the casing and provided with an oxygen pasage..ai'i annular nozzle carrier rotatably titted on the conical part, a plurality of radially disposed nozzles of di'llerent capaeities arranged on the carrier. and a gas supply pipe connnunicating with the casing.

23. A. blow pipe of the type set forth com prising a closed casing. a shell projecting radially therefrom and forming a mixing chamber, a conical part. projecting into the casing and prm'ided with an oxygen passage. an annular nozzle carrierrotittably fitted on the conical part, a spring for holding the nozzle carrier in position on the conical part. a plurality of radially disposed. nozzles of ditlerent capacities arranged on the carrier, and a gas supply pipe communicating with the casing. I

4. A blow pipe of the type set forth comprising a closed casing, a shell projecting therefrom and forming a mixing chamber, a nozzle carrier rotatably mounted in the casing, a stem for turning the nozzle carrier and which projects through a wall of the casing, a plurality of nozzles of different capacities arranged on'the carrier, a part having an oxygen supply duct and with which a nozzle alines when it also alines with the mixing'chamber, and a gas sup- 'prising a closed casing,

-adjacent wall of the casing and by which the nozzle carrier may be turned, a plurality of radially disposed nozzles of different capacities arranged on the carrier, and a gas supply pipe communicating with the casing. I I A 6. A blow pipe of the type set forth comprising a closed casing, a shellprojecting therefrom and forming a mixing chamber,

the shell, having a tapering inlet end, a

nozzle carrier rotatably mounted in the easing, a plurality of nozzles of different capacities arranged on the carrier, each nozzle having such outline asto coact with the tapering inlet end to provide a gradually constricting throatway through which gas may flow from the casing to the mixing chamber, a part having an oxygen supply duct and with which a nozzle alines when it also alines with the mixing chamber, and a gas supply pipe communicating with the casing. a

7. A blow pipe of the type set forth comprising a closed casing, a shell projecting therefrom and forming .a mixing chamber, a projection arranged Within'the casing, an

annular nozzle carrier rotatably fitted on the projection, a plurality of nozzles of different capacities fitted on the carrier, the projec'tir n 'having independent gas and. oxygen supply ducts and having a coaxial extension exterior of the casing, gen pipes communicating with the ducts,

gas and oxy- 1 I and a turning plug fitted in the extension I and having independent openings arranged to simultaneously tive ducts. a

8. A blow pipe of the type set forth including a mixing chamber, means for supplying oxygen and gas thereto in proper proportions, casing fitted exteriorly on the shell of the mixing chamber, a rotary nozzle carrier disposed in the casing, a plurallty of nozzles of different capacities arrangedradlally on the carrier each nozzle be'ing -capablebf being positioned adjacent the flame end of the mixing chamber, and an oxygen supply pipe terminating .in a duct which isarfafigetl to communicate with the nozzle positioned adjacent the flame end of the mixing chamber.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses; HEINRICH KNAPP. Witnesses:

ERNST EBERHARDT, HANNS KLUMIoH.

register .with the respec 

